Brake



A. Y. DODGE Aug. 28, 1934.

BRAKE Filed Nov. l9 1927 .INVENTO'R ADIELY. DODGE ATTORNEY Patented Aug. 28, 1934 a 1,971,602

Adiel Y. Dodge, South Bend, Ind, assignor to Bendix liralte Company, South Bend, lfnd., a corporation of Illinois Fries Application November 19, 1927, Serial No. 234,310

Claims. (01. 1238- -78) This invention relates to brakes, and is illusthe end of the friction face of shoe l6 and antrated as embodied in an internal expanding ohored on a pivot 30. The anchor arm portion brake for an automobile. An object of the inof the web of shoe 18 is provided with a washer vention is to so arrange the brake to permit 32 welded to its side and extending the bearthe use of a simplified form of shoe, preferably ing on the pivot 30, and with a relatively large 6 stamped from sheet steel in one piece, in which opening 34, giving ample clearance to the pivthe stiilening web of the shoe is on the side 0t 28. of the braking flange next to the backing plate. Shoe i6 is provided with a reinforcing plate This permits the use of very short brake anchors, 35 welded to its side, and extending the bearing 0 etc, since the shoe webs are immediately adjafor pivot and slidably resting against a heavy cent the backing plate. reinforcing plate 38 connecting and bracing the Various features of novelty relate to anchoring anchor pins 28 and 30. A tie plate edmay be overlapping parts of the shoes, to a novel articupressed over the ends of anchor pins 28 and 30, lation connecting two of the shoes, to a new a spring Washer 42 on pivot 28 compensating for l5 arrangement of steady rest for the shoes, to a washer 32. It will be noted that since the webs roller mounting at the end of the shoe, and to of shoes 16 and 18 are immediately adjacent the other new and desirable structural features which backing plate, the anchors 28 and 30 may be will be apparent from the following description very short, thus minimizing the overhang and of one illustrative embodiment shown in the acincreasingthe strength. 20 companying drawing, in which: Shoes 14 and 16 are connected by a floating Figure 1 is a vertical section through the brake, pivot 46 having a head slidably engaging the just inside. the head of the brake drum, showbacking plate. Pivot 46 has a large-diameter ing the brake shoes in side elevation; portion 48 forming a collar adjacent the head, Figure 2 is a partial section on the line 2-2 and on which shoe 16 is mounted. At this end, 25 of Figure 1, showing the articulation between two shoe 16 is reinforced by a plate 50 welded tothe of the shoes; backing-plate side of its web, and serving to in- Figure 3 is a partial section on the line 3-.3 crease the width of the bearing on pivot 46. Shoe of Figure 1, showing a steady rest; 14, to which a washer 52 is welded to increase the Figure 4 is a partial section onthe line ll bearing surface, is mounted on a smaller-diam- 30 of Figure 1, showing the shoes and the brakeeter part 54 of the pivot 46, thus resting against applying means in top plan; the collar 48 so that it does not bind against shoe Figure 5 is a section through one of the shoes, 16. Pivot 46 is provided with a stop at its end, on the line 5-5 of Figure 1; and for example, a washer 56 held by a cotter pin 58, Figure 6 is a partial section through the brake and a coil spring 60. is sleeved on the pivot and 35 anchors, on the line 6-6 of. Figure 1. held under compression between the stop 56 and In the arrangement selected for illustration, the shoe 14. An auxiliary return spring 62, conthe brake includes a rotatable drum 10, at the nected at one end to the backing plate and at the open side of 1 which is a backing plate 12, and other end to shoe 16, urges the head of pivot 46 within which are arranged three novel brake against an adjustable eccentric stop G ito fix the 4 s s 4, 16, a d 8, m r ially'known as the .idleor released position of shoe 16.

p maryt, secondary, and auxiliary Shoes, Shoes 14 and 18 are preferably mirror images p y- Each S1108 i v pref rably d awn 0 of each other, so that the shoe 14 of a left brake Stamped frOm Sheet Steel, With the body of the will be interchangeable with the shoe 18 of a hoe ell i ne pi n n rally L-shaped in right brake, and the shoe 18 of a left brake will i 45 crossrsection, as shown in Figure 5. This gives be interchangeable with the shoe 14 of a right 1100 a br kin flan 20 carrying suitable friction linbrake. The ends of shoe 16 are so made that the ing 22, at one side of which, on the side next shoe is symmetrical with respect to the vertical the backing plate, is the stiffening web 24, prefcenter line of the brake, and may be turned end erably reinforced against buckling by a short latfor end according to whether it is for use in a 50 eral flange 26 at its inner edge. left brake or a right brake.

Shoes 16 and 18 overlap at their adjacent ends, 1 Shoe 14, therefore, is formed with an opening the web of shoe 16 being extended as an an- 66 corresponding to the opening 34 of shoe 18, chor arm past the end of the friction face of while shoe 16 has at its left end an opening 68 shoe 18 and anchored on a pivot 28, and the web registering with the opening 66 and correspond- 55 of shoe 18 being extended as an anchor arm past ing to the opening pivotedon anchor 28. Advan- 21,10

tage may be taken of these registering openings to provide a novel steady-rest for shoes 14 and 16. I'his steady-rest is shown as including a post carried by the backing plate and projecting through the openings, and which has a collar "12 engaging the backing plate and against which a washer 74 rests, shoe 16 being in sliding engagement with this washer. A stop is provided at the end of post '70, for example in the form of a washor 76 held by a cotter pin '78, while a coil spring 80 sleeved on post 70 is confined under compres-= sion between the stop 76 and a washer 82 slidably engaging shoe 14.

At their upper ends, shoes 14 and 18 are connected by a tension coil return spring 84, and they are also provided at their ends with reinforcing plates or stampings 86 welded to opposite sides of their webs. Preferably rollers 83 are mounted in pairs on opposite sides of the web of each of these shoes at its end, for engagement with cams 90 embracing the shoe ends between the: the cams being slotted to float on a flattened portion of a camshaft 92 journaled in a bearing 94, carried by the backing plate 12.

While one illustrative embodiment has been described in detail, it is not my intention to limit the scope of the invention to that particular embodiment, or otherwise than by the terms of the appended claims.

I claim:

1. A brake comprising, in combination with a drum and a backing plate at open side or the drum, a pair of each h ving a stiflening web at one do only immedie y adjacent the backing pl and each with a braking flange extending laterally from. said web'away from the backing plate and engageable with the drum when the shoe is moved outward, the braking flanges of shoes being arranged end to end and each of the stiilening webs at ends or the shoes projecting as an anchor arm overlapping part of the web of the other shoe, and anchoring means carried by the backing plate and engaging said anchor rins of the shoes.

2. A brake co in combination with a drum and a backing plate at the open side of the drum, a pair of shoes each havin a stiifening web at one side only immediately adjacent the backing plate and each with a braking flange extending laterally from said web away from the backing plate and engageable with the drum when the shoe is moved outward, the braking flange of of said shoes being arranged end to end and each of the stirrer g webs at ends of the shoes projecting an ape .or arm overlapping part of the stiffening wen or the other shoe, and anchoring pivots carried by the backing plate and on which said anchor arms are mounted.

3. A brake comp ising, in combination with a drum and a backing plate at the open side of the drum, a pair of shoes each having a stiffening web at one side only immediately adjacent the backing plate and each with a braking flange extending laterally from said web away from the backing plate and engageable with the drum when the shoe is moved outward, the braking flanges of said shoes being arranged end to end, anchoring means acting on the ends of the webs of said shoes and connecting said stiffening webs to the backing plate, and applying means also acting on the webs of said shoes.

l. A brake comprising, in combination with a drum and a backing plate at the open side of the drum, a pair of shoes each having a stifiening web at one side only immediately adjacent the backing plate and each with a braking flange extending laterally from said web away from the backing plate and engageable with the drum when the shoe is moved outward, the braking flanges or" said shoes being arranged end to end, and anchoring means acting on the ends of the webs of said shoes and connecting said stiffening webs to the backing plate.

5. A brake comprising, in combination with a rum and a backing plate at the open side of the drum, 9. pair of shoes within the drum having stiffening webs on the side next the backing plate and having braking flanges extending away from the backing plate, the stifiening webs overlapping at the end of the shoe, and an articulating pivot passing through the overlapping webs and having its end slidably engaging the backing plate.

6. A brake comprising, in combination with a drum and a backing plate at the open side of the drum, a pair of shoes within the drum having stiffening webs on the side next the backing plate and having braking flanges extending away from the backing plate, the stiffening webs overlapping at the end of the shoe, an articulating pivot passing through the overlapping webs and having a head on its backing plate end, a stop on the opposite end of the pivot, and a spring sleeved on the pivot and confined between the stop and said webs.

'7. A brake comprising, in combination with a drum and a backing plate at the open side of the drum, a pair or shoes within the drum having stifiening webs on their sides adjacent the backing plate and having braking flanges extending away from the backing plate, the stiffening webs having overlapping portions, and a steady rest for said overlapping portions of the webs and which is carried by the backing plate.

8. A brake comprising, in combination, a pair of shoes overlapping for some distance at their ends, a pivot connecting the ends of one shoe to a part of the other shoe some distance from its end, and a steady-rest holding the end of said other shoe and also holding a part of said one shoe some distance from its end.

9. A brake comprising three shoes, each having a braking flange and a stiffening web at one side only or" the braking flange to form a shoe body generally L-shaped in cross-section, the webs of the two end shoes overlapping opposite ends of the web of the center shoe.

ADIEL Y. DODGE. 

